WENFEI ELECTRICAL
CRITICAL INFRASTRUCTURE SOLUTIONS

Power
Utilities
& Substations

Mission-critical transformer and voltage regulation systems engineered for utility-scale power distribution. ISO 9001 certified solutions delivering reliable performance worldwide.

0%
Uptime Reliability
0kV
Max Voltage
0MVA
Max Capacity
HV IN LV OUT LOAD AVR
Fig. 01 // Grid Interface

Application
Scenarios

Wenfei transformers and voltage regulators are deployed in critical utility infrastructure worldwide. From transmission substations to distribution networks, our solutions ensure stable power delivery under demanding operational conditions.

Transmission Substation
110kV - 220kV

TRANSMISSION SUBSTATIONS

High-voltage oil-immersed transformers for bulk power transmission. Designed for 110kV-220kV step-down operations in regional networks.

Capacity Range
1000kVA - 10000kVA
Cooling Type
ONAN / ONAF
Distribution Substation
10kV - 35kV

DISTRIBUTION SUBSTATIONS

Dry-type and oil-immersed transformers for urban networks. Compact design with low partial discharge and minimal maintenance.

Installation
Indoor / Outdoor
Protection
IP20 - IP54
Voltage Regulation
±20% REGULATION

VOLTAGE REGULATION

Automatic voltage regulators and SVR transformers for grid stabilization. Essential for areas with unstable power supply.

Accuracy
±1% - ±2%
Response Time
< 0.5s (AVR)
Smart Grid Integration
SMART GRID

SMART GRID INTEGRATION

Intelligent contactless stabilizers with microprocessor control. Seamless integration with SCADA systems for real-time management.

Communication
RS485 / Modbus / Ethernet
Monitoring
Real-time Remote Access

Technicaln
Specifications

Comprehensive technical parameters for utility-grade transformers and voltage regulation equipment. All products comply with international standards and undergo rigorous factory testing.

OIL-IMMERSED POWER TRANSFORMERS

High-Voltage Distribution

Parameter Specification Standard
Voltage Rating 10kV - 110kV IEC 60076-1
Capacity Range 50kVA - 10000kVA GB/T 1094.1
Cooling Method ONAN / ONAF / OFAF IEC 60076-2
Efficiency > 98.5% GB 20052
Insulation Level Class A / F IEC 60085
Ambient Temp. -25°C to +45°C IEC 60076-2

DRY-TYPE CAST RESIN TRANSFORMERS

Indoor Distribution

Parameter Specification Standard
Voltage Rating 10kV - 35kV IEC 60076-11
Capacity Range 30kVA - 2500kVA GB/T 10228
Cooling Method AN / AF IEC 60076-11
Insulation Class F / H IEC 60085
Protection Grade IP20 - IP54 IEC 60529
Partial Discharge < 10pC IEC 60076-11

AUTOMATIC VOLTAGE REGULATORS

Grid Stabilization

Parameter Specification Standard
Input Voltage Range ±15% - ±30% IEC 60038
Output Accuracy ±1% - ±2% GB/T 14549
Response Time < 0.02s (Contactless) / < 2s (Servo) --
Efficiency > 98% --
Waveform Distortion < 3% (No-load) GB/T 14549
Overload Capacity 120% (1h) / 150% (1min) --

Quality
Assurance

All Wenfei power utility products are manufactured under ISO 9001 quality management system and comply with international standards including IEC, GB/T and ANSI. Each transformer undergoes comprehensive factory acceptance testing including routine tests, type tests and special tests.

ISO 9001:2015
Quality Management System
CE Certification
European Conformity
IEC 60076 Series
Power Transformer Standards
GB/T 1094 Series
Chinese National Standards

FACTORY TESTING

  • Voltage ratio & resistance
  • No-load & load loss
  • Short-circuit test
  • Partial discharge (<10pC)
  • Temperature rise
  • Impulse voltage
HV TEST SET DUT VOLTMETER AMMETER PD DETECTOR

Ngineer Your
Power Solution

Contact our technical team for custom transformer and voltage regulator solutions tailored to your utility infrastructure requirements. From initial design consultation to commissioning support, Wenfei delivers turnkey power solutions.

Technical Inquiry
sales@wenfei-electric.com
Sales Department
sales@wenfei-electric.com
Factory Location
Liushi Town, Wenzhou, Zhejiang, China

REQUEST QUOTATION

Typical response time: < 24 hours